7.11 IsGroup

IsGroup( obj )

IsGroup returns true if obj, which can be an object of arbitrary type, is a parent group or a subgroup and false otherwise. The function will signal an error if obj is an unbound variable.

    gap> IsGroup( Group( (1,2,3) ) );
    true
    gap> IsGroup( 1/2 );
    false 

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GAP 3.4.4
April 1997